The formation is named after the Point Loma peninsula in southwestern San Diego County, California.

Their description is that the lower half is composed of interbedded fine-grained, dusky yellow sandstone and olive-gray clay shale in ledgy graded beds about 20 cm thick, which grades into massive grayish-black siltstone in the top half of the formation.

The formation is found from Point Loma north to La Jolla, within the city of San Diego.

[2] In 1967 Brad Riney found a single hadrosaur neck vertebra in a sea cave in La Jolla.

[3] In about 1980 Leon Case found the midsection of a right dentary with teeth of a hadrosaur while walking along a beach in San Diego County.